This text surrounds the development of the electric power SCADA system exactly, aiming at the present condition of the our country electric power charged barbed wire net currently, according to the oneself at the e- lectric power protect the profession after the electricity in seven years of development, design and adjust to try the experience on the scene from following severals carry on the treatise:Is the emergence to the system of SC- ADA and developments to introduce first Carry on the introduction elucidation to applied present condition and the development foregrounds of various terminal equipments communication agreement(rules invite) the next in order Then is the elucidation to the windows the bottom according to the mfc the plait distance environment an- d VC++6.0 plait distance softwares Carry on the more detailed treatise to the realization of the procedure struct- ure frame and the source code again End is the applied case example give examples.
标签： the development surrounds electric
上传时间： 2014-10-28
上传用户：liuchee
KPhoneIM is a simple point to point instant messaging application. You may chat with (exactly) one partner directly. The tool needs no server. It may be called from KPhoneSI as external session. Indeed, I develloped the tool mainly to demonstrate KPhoneSI s concept of external sessions!
标签： point application messaging KPhoneIM
上传时间： 2015-09-13
上传用户：lhw888
Tic tac toe is (exactly what re your thinking) and it s the first game I made. Made it in one whole day in Turbo C. It uses primitive graphics drawing and also demonstrates how to output an image. Written in C, also uses a library I got from the net (included) for image output.
标签： thinking exactly first whole
上传时间： 2017-08-13
上传用户：xhz1993
as exactly an interface solution using spec analyser
标签： interface analyser solution exactly
上传时间： 2013-12-24
上传用户：kelimu
在国内Protel软件一直大受欢迎，从DOS时代的Protel3.3(Autotrax 1.61)到现在具有EDA Client/Server （客户/服务器）即C/S“框架”体系结构的Protel98，它始终是PCB设计和制造领域的大众化工具软件，成为电子设计工作者们的首选。 在规范化的设计管理中，设计文件图样必须遵守相应的国家标准，如《电子产品图样绘制规则》、《设计文件管理制图》和《印制板制图》等，而由于Protel软件都是英文版，因此无法直接打印出符合国家标准的图纸，要将图纸规范化常用的方式是套打，即先将符合国家标准的表和汉字等打在纸上，再将该纸放入打印机，用Protel软件将印制板图打印其上，形成符合标准的文件，但这种做法效率很低，而且图形常会打偏，有时甚至会打反，经笔者试验，找到了一种简便的方法，使印制板图转换为AUTOCAD格式，再在AUTOCAD里一次性打印出符合标准的图纸。
上传时间： 2013-10-12
上传用户：Wwill
Differential Nonlinearity: Ideally, any two adjacent digitalcodes correspond to output analog voltages that are exactlyone LSB apart. Differential non-linearity is a measure of theworst case deviation from the ideal 1 LSB step. For example,a DAC with a 1.5 LSB output change for a 1 LSB digital codechange exhibits 1⁄2 LSB differential non-linearity. Differentialnon-linearity may be expressed in fractional bits or as a percentageof full scale. A differential non-linearity greater than1 LSB will lead to a non-monotonic transfer function in aDAC.Gain Error (Full Scale Error): The difference between theoutput voltage (or current) with full scale input code and theideal voltage (or current) that should exist with a full scale inputcode.Gain Temperature Coefficient (Full Scale TemperatureCoefficient): Change in gain error divided by change in temperature.Usually expressed in parts per million per degreeCelsius (ppm/°C).Integral Nonlinearity (Linearity Error): Worst case deviationfrom the line between the endpoints (zero and full scale).Can be expressed as a percentage of full scale or in fractionof an LSB.LSB (Lease-Significant Bit): In a binary coded system thisis the bit that carries the smallest value or weight. Its value isthe full scale voltage (or current) divided by 2n, where n is theresolution of the converter.Monotonicity: A monotonic function has a slope whose signdoes not change. A monotonic DAC has an output thatchanges in the same direction (or remains constant) for eachincrease in the input code. the converse is true for decreasing codes.
标签： Converters Defini DAC
上传时间： 2013-10-29
上传用户：stvnash
2-1 何谓测量放大电路？对其基本要求是什么？ 在测量控制系统中，用来放大传感器输出的微弱电压，电流或电荷信号的放大电路称为测量放大电路，亦称仪用放大电路。对其基本要求是：①输入阻抗应与传感器输出阻抗相匹配；②一定的放大倍数和稳定的增益；③低噪声；④低的输入失调电压和输入失调电流以及低的漂移；⑤足够的带宽和转换速率（无畸变的放大瞬态信号）；⑥高输入共模范围（如达几百伏）和高共模抑制比；⑦可调的闭环增益；⑧线性好、精度高；⑨成本低。 2-2 图2-2a所示斩波稳零放大电路中，为什么采用高、低频两个通道，即R3、C3组成的高频通道和调制、解调、交流放大器组成的低频通道？ 采用高频通道是为了使斩波稳零放大电路能在较宽的频率范围内工作，而采用低频通道则能对微弱的直流或缓慢变化的信号进行低漂移和高精度的放大。 2-3 请参照图2-3，根据手册中LF347和CD4066的连接图（即引脚图），将集成运算放大器LF347和集成模拟开关CD4066接成自动调零放大电路。 LF347和CD4066接成的自动调零放大电路如图X2-1。
标签： 信号放大电路
上传时间： 2013-10-09
上传用户：ysjing
随着计算机软、硬件技术的快速发展，给人类生产、生活及传统的产品设计和生产组织模式都带来了深刻的变革，随着计算机应用领域的日益扩大，涌现了许多以计算机技术为基础的新兴学科，模具CAD/CAE/CAM便是其中之一。模具CAD/CAE/CAM是一门基于计算机技术而发展起来的、与机械设计和制造技术相互渗透、相互结合、多学科综合性的技术，随着计算机技术的迅速发展、数控机床的广泛应用及相关软件的日益完善，CAD/CAE/CAM技术在电子、机械、航空、航天、轻工等领域得到了广泛的应用。
上传时间： 2013-10-30
上传用户：u789u789u789
保定众邦公司开发生产的零序电流互感器是用于电力电缆上的一种互感器，它的一次绕组为穿过互感器内孔的三相一次导体电缆（或是单相电缆），它的一次电流是一次三相电流的矢量和（在三相平衡时为0），当发生系统单相接地时或三相平衡时，矢量和不为0，零序电流互感器的二次有电流输出，可以供给保护装置，实现保护和监控。由于电缆自身绝缘，零序电流互感器外壳也是绝缘的，所以零序电流互感器可以使用在任一电压等级的电缆上
标签： 零序电流互感器
上传时间： 2014-12-24
上传用户：wentian_e
针对盘山路存在的转弯盲区，即在转弯时司机无法得知弯路对面是否有车辆通过，设计一种基于C8051F310的山路转弯预防警示系统。该系统利用一阶滤波算法检测山路转弯时是否有车辆通过。运用该算法可增强系统检测的实时性，提高检测机动车辆的灵敏度，同时大大减少环境温度对检测的干扰。试验表明该系统能够正确指示出在山路转弯时是否有车辆通过，目前该系统已安装在盘山路上，可大大减少事故的发生率。 Abstract: Aiming at passing hilly road，there is a turn blind spot.Motormen usually do not know if the passing of vehicles pass the road.So a system of defending accident on hilly road is designed,which is based on MCU C8051F310.The sys-tem uses the first-order filter algorithm to detect whether there are passing vehicles.This algorithm enhances the real-time detection and improves the sensitivity of detection vehicles.Meanwhile,it reduces the detection interference of environmen-tal temperature.The experimental results show that this system can exactly indicate if there are passing vehicles.At present,the system has been successfully applied to hilly road.The system can greatly decrease accident.
上传时间： 2013-10-10
上传用户：归海惜雪
